C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 15/10 (2006.01) C11D 3/39 (2006.01) C11D 17/00 (2006.01)
Patent
CA 2159991
Sodium percarbonate is often used, in the form of encapsulated particles, in washing and cleaning agents in order to increase their shelf life. Sodium percarbonate particles encapsulated as proposed by the invention have an envelope containing the products of the reaction between a di-alkali-metal tetraborate or alkali-metal pentaborate and aqueous hydrogen peroxide. Preferred envelope components are perborax compounds of the formula Na2B4O7.nH2O2 in which n is 1 or 4. The encapsulated sodium percarbonate particles are produced by coating the percarbonate particles using a solution containing the specified reaction products. Washing, bleaching and cleaning agents containing sodium percarbonate particles encapsulated as proposed by the invention are characterized by their very long shelf life.
Bertsch-Frank Birgit
Bewersdorf Martin
Klasen Claas-Jurgen
Lieser Thomas
Muller Klaus
Aktiengesellschaft Degussa
Marks & Clerk
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